He is the mischievous, rebellious, misunderstood and "potentially dangerous" eldest child of Homer and Marge Simpson , and the older brother of Lisa and Maggie. He also has been nicknamed "Cosmo", after discovering a comet in "Bart's Comet".
Bart is loosely based on Matt Groening and his older brother, Mark Groening. Even at a young age, Bart has accomplished many feats. He has won an award for his Angry Dad web series  , he has discovered a new comet which was named after himself  , and he also has performed in a successful band with Milhouse Van Houten , Nelson Muntz and Ralph Wiggum. Bart is a self-proclaimed underachiever and prankster who is constantly in detention. He is easily distracted.
His penchant for shocking people began before he was born: Hibbert while he performed a sonogram on Marge when she was pregnant with him, and moments after being born, he set Homer's tie on fire Marge saying that he could not have done it on purpose because he was only ten minutes old . Bart's first words were " Ay Caramba ".
Yuma Hickman moved to Springfield when Marge was pregnant with Bart. Bart hinted that his favorite movies are Jaws and the Star Wars trilogy. Bart is the most misunderstood of the family After Maggie , who currently can only speak a few words , constantly frustrated by the narrow-minded people of Springfield , who judge him merely by his thoughts and actions.
Bart dies at the age of 80 at some point in or early assuming his birth year of after a successful career as a Supreme Court judge. He was killed after being run over by a dead Seymour Skinner 's wheelchair. Bart's overall intelligence, like his mother's , has been shown to fluctuate slightly over the course of the series. It has been shown anywhere from being just above his father's level, to being just below, or on the rare occasion that he shows interest or is willing to pay attention exceeding that of his sister.
Despite his behavior, Bart is also extremely good at science, art and even sports like skateboarding. His actions and speech frequently show considerable mental agility, street-smarts, and understanding.
When Bart became a hall monitor for Springfield Elementary, his grades went up, showing that he only struggles because he does not pay any attention. On the other hand, Bart often seems to have trouble understanding even the simplest concepts, such as the word "irony," what the equator is and that the logo on his globe " Rand McNally " is not actually a country.
It was also once implied that his mischievous behavior may have been a result of Marge accidentally ingesting a droplet of champagne while pregnant with him.
Labeled as an "underachiever" by authority figures, Bart rides an academic roller coaster, his grades, running the Loop-the-Loop from "F" to "D-" and back again. But he can be ingenious when the chips are down—as long as his ingenuity is not applied to anything school-related. He once learned portions of the Talmud to help reunite his idol, Krusty the Clown , with his father, Rabbi Hyman Krustofsky. Once, after unleashing a surf wave across the school damaging property but also saving Ned Flanders, who was on fire at the time , Bart was given an experimental drug for Attention Deficit Disorder called Focusyn.
Focusing his energy allowed Bart's intellectual potential to reach its maximum, even to the point where he was capable of tutoring a Navajo boy. Unfortunately, the drug also drove him paranoid as a side effect, and he started to believe that Major League Baseball was using satellites to spy on everyone in town.
Marge and Homer became concerned for his erratic behavior and tried to take him off the drug, but the prospect of losing his intellectual edge over his enemies causes Bart to go berserk and sneak into Fort Fragg to steal one of its tanks. After blazing a path of destruction through the town, Bart uses the tank's cannon to shoot down an MLB satellite, thereby actually proving his suspicions to be correct.
In " The Crepes of Wrath " while on an exchange trip to France, Bart managed to learn French without even realizing it simply by being in the vicinity of Ugolin and Cesar , two men who regularly spoke French. Later, during " Homer vs. Patty and Selma ", he showed considerable talent in the ballet despite his initial hatred of it, which he did not realize until he attempted to take off his leotard. He has also managed to do this by choice such as in " Blame It on Lisa ", wherein Bart learns fluent Spanish in less time on a plane to Brazil, only to be told by Marge that the Brazilians speak Portuguese.
He was also frequently a delinquent, getting into all sorts of trouble. It is implied that his exceptionally mischievous behavior which Lisa once noted was borderline sociopathic had its roots from when Marge accidentally ingested a drop of champagne caused by then-Mayor Quimby breaking a champagne bottle on the newly christened battleship, the U. Float-and-shoot while still pregnant with Bart  , as well as out of some deep-down rage for being told that he'll be a failure as early as preschool of which it once led to him developing suicidal thoughts severe enough to make an extremely graphic drawing of his own demise.
However, he has put limits on the trouble he can cause; he won't lower himself as to stealing the school textbooks like Lisa did while he was the hall monitor. Although he gets into trouble and is sometimes shallow and selfish, Bart also exhibits many qualities of high integrity. He has, on a few occasions, helped the love life of his school Principal and his teacher , despite the fact he often terrorizes them, and he often befriends lesser known kids like Milhouse.
One example of his quasi-sense of honor is when Bart stands up for Ralph Wiggum at the cost of peer popularity with the bullies. Instead of outright refusing the challenge, Bart instead tries to intentionally miss the bird.
Unfortunately, Bart doesn't compensate for a crooked sight, and he accidentally kills the bird. He is visibly upset by this, snapping at Nelson when he calls him a "cold-blooded killer" and even goes so far as to try and mend his wrongs with a right by adopting the bird's nest.
Bart also displays his sense of morality when he acts as a conscience for his peers several times throughout the series, such as when he tells Jessica Lovejoy that stealing from the church is wrong.
He was once sent to a juvenile detention center when he played a serious prank involving faux wedding gifts and a fake wedding. A notable example of the former is when he was framed for a prank at a medieval festival held at school and was expelled for it the actual culprit was Groundskeeper Willie but he was welcomed back as an apology  , and a notable example of the latter was when both he and Milhouse ended up permanently at the time banned by Comic Book Guy from the Androids Dungeon because Bart and Milhouse talked Mrs.
Prince out of selling him rare and invaluable Star Wars memorabilia that belonged to Martin Prince for what was obviously a ripped off price. He becomes extremely attached to animals that fall under his care and will, most of the time, save animals that he feels will be hurt or else will go to great lengths to protect them. Some of Bart's favorite pets include: Stampy meets the Simpsons.
Appearance Bart has yellow skin and blond spiky hair that matches the color of his skin similar to his sisters , sports a slightly fat belly, and, like the other characters of The Simpsons, has big black pupils with no colored irises for eyes. He wears a red-orange t-shirt salmon in " Bart Gets an "F" ", blue short-sleeved shirt on early merchandise , blue shorts and blue sneakers with white socks. He sometimes wears his "lucky" red baseball cap and carries around his skateboard or a slingshot.
In his future appearances, his hair is usually longer, and he is shown to be slightly fat. Bart is also known as "The Devil in Blue Shorts"  by the organizers of the Teacher of the Year Awards, but he was believed to be an urban legend.
Relationships Family Homer angrily strangling Bart Due to Bart's mischievousness and rebelliousness in addition to Homer's often uncaring and incompetent behavior, the two have a turbulent relationship. Bart will often address Homer by his given name instead of "Dad" when he was a baby, this was because other adults would refer to him as this , while Homer in turn often refers to him as "the boy".
Usually, when Homer finds out that Bart has said or done something stupid or bad, he turns red and shouts " Why you little! Homer and Bart's relationship reaches a breaking point following Homer's pollution of Lake Springfield causing Springfield to be sealed under a giant dome by the EPA , with Bart even going so far as saying that he wishes Flanders was his father.
Even though at other times, Bart is shown bonding with his father, such as through coin collecting or selling grease. Bart has even danced opposite Homer when the latter became a popular mascot. It is often suggested that Bart is at times hurt that he and his father are in opposition to each other.
Homer, despite being under the influence of marijuana at the time, genuinely explains that it is because Bart's birth signified the end of his youthful foolishness, as he now had a family to provide for, which intimidated him. Also adding that he is very much like Bart, as like his son, he is greatly misunderstood and insecure about his place in the family.
Nevertheless, the two really do love each other deep down. Bart shares a sibling rivalry with Lisa , who is two years and thirty-eight days younger than he is.